Did you ever experience any of these things?
• You spend a lot of time searching for things (documents, keys, USB drive, scissors, stapler, wallet).
• You forgot about a magazine you promised to bring for a friend.
• You are in a meeting when someone calls you on your mobile phone. You said you would call back but then forget to do so.
• You kick yourself for not buying batteries (or stickers, printer cartridge, bread, milk, etc) on your way home.
You can probably relate to many of these situations. Absent-mindedness wastes a lot of time and can be a nuisance. It leaves you feeling irritated and can affect your productivity.